Seismicity, deformation and seismic hazard in the western rift of Corinth: New insights from the Corinth Rift Laboratory (CRL)

Bernard, Pascal; Lyon‐Caen, H.; Briole, Pierre; Deschamps, A.; Boudin, F.; Μακροπουλοσ, Κ.; Papadimitriou, P.; Lemeille, Francis; Patau, G.; Billiris, H.; Paradissis, Demitris; Papazissi, K.; Castarède, Hugues; Charade, Olivier; Nercessian, Alexandre; Avallone, A.; Pacchiani, Francesco; Zahradnı́k, Jiřı́; Sacks, S. I.; Linde, A. T.

doi:10.1016/j.tecto.2006.02.012

Cited by 153 publications

(173 citation statements)

References 38 publications

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“…The vertical component was not well modeled at Trizonia and Kalithea, because of the high level noise. The focal mechanism revealed normal type faulting with an E-W fault plane direction which is a very common focal mechanism solution for this region, as presented by the seismotectonic studies of Agalos and Lentas (2004) and Bernard et al (2006).…”

Section: Earthquakes Modeled In Greecementioning

confidence: 60%

“…For the Aegean data from stations operated by Mednet, NOA, and Geofon were used. In addition, broadband data from the three new stations Kalithea, Laka and Trizonia which are located in the western part of the Gulf of Corinth and provide data to the CRL (Bernard et al 2006), were also used. The first two belong to the Athens University (and use Guralp CMG 40T instruments) and the third one to IPGP (France).…”

Section: Applied Methodology and Preparation Of The Data For Inversionmentioning

confidence: 99%

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Source parameters estimation from broadband regional seismograms for earthquakes in the Aegean region and the Gorda plate

et al. 2018

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Section: Earthquakes Modeled In Greecementioning

confidence: 60%

Section: Applied Methodology and Preparation Of The Data For Inversionmentioning

confidence: 99%

Source parameters estimation from broadband regional seismograms for earthquakes in the Aegean region and the Gorda plate

et al. 2018

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“…The seafloor and Reflector 2 are subhorizontal, which suggests that the recent activity of faults bordering both the north and south sides of the Western Gulf is similar. The central part of Trizonia Island, located on the footwall of the Trizonia fault, is subsiding at 5 ± 2 mm yr −1 (GPS data; Bernard et al, 2006). This suggests that, though the Trizonia fault is an active structure, some deformation occurs north of this fault as well.…”

Section: Along Strike Changes In Rift Structure and Rift Polaritymentioning

confidence: 99%

“…The upper 4 km of the crust is characterized by a lack of seismicity, which makes the link between the surface faults and the deep structure quite speculative. One of the reference geodynamic models consists of steeply Flotté et al (2005), and Ferentinos et al (1985); Achaia fault zone from Feng et al (2010); northern blinded faults from Kiratzi et al (2008); Gulf of Corinth faults from this study (simplified), Bernard et al (2006) and Bell et al (2008). M N 4 superficial earthquakes (focal depth b15 km) focal mechanisms from Kiratzi and Louvari (2003), Kiratzi et al (2008), Hatzfeld et al (1990), and RCMT catalogue (http://www.bo.ingv.it/RCMT/).…”

Section: Along Strike Changes In Rift Structure and Rift Polaritymentioning

confidence: 99%

“…Late Quaternary slip rates of these faults have been estimated at about 1.9-2.7 mm yr −1 (Kamari fault system), 0.3-2.0 to 7-11 mm yr − 1 (Eliki faults), and 1.6-6.3 to 9-11 mm yr −1 (Aigion fault) based on the analysis of trenches (Koukouvelas et al, 2001(Koukouvelas et al, , 2005(Koukouvelas et al, , 2008Pantosti et al, 2004;Palyvos et al, 2005) and uplifted shorelines combined with dislocation modeling Marine Geology 360 (2015) [55][56][57][58][59][60][61][62][63][64][65][66][67][68][69] , respectively. The activity of the Trizonia fault is unknown, and its footwall is now subsiding at a rate of 5 ± 2 mm yr −1 according to GPS measurements (Moretti et al, 2003;Bernard et al, 2006). At depths greater than 5 km, seismological studies have evidenced a fully asymmetrical extensional system, where deformation occurs on a horizontal or low-dipping zone of microseismicity linked to the north-dipping coastal fault system Lyon-Caen et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

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Active faulting at the western tip of the Gulf of Corinth, Greece, from high-resolution seismic data

et al. 2015

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International audienceThe Gulf of Corinth is one of the fastest-spreading intra-continental rifts on Earth. GPS data indicate that the rift is currently opening in a NNE-SSW direction, with a rate of extension reaching up to 16 mm yr (super - 1) in its westernmost part. Although the rest of the offshore rift has been well studied, the western tip of the rift is still poorly explored. We present an accurate map of submarine faults in this area based on two high-resolution seismic reflection surveys (single-channel sparker). In the eastern part of the studied area, the sedimentary infill is affected by the known North Eratini, South Eratini, and West Channel faults. Further to the west, the seafloor is mostly flat and is bounded to the north by the normal, south-dipping, Trizonia fault. To the north, the shallower part of the Gulf shows to the east a diffuse pattern of normal and strike-slip deformation, which is replaced to the west by a 7.5 km long SE striking strike-slip fault zone, called the Managouli fault zone. To the westernmost tip of the Gulf, in the Nafpaktos Basin, two fault sets with different strikes are encountered; the one with a NE-SW strike exhibits a clear strike-slip component. The western tip of the Gulf of Corinth is the only part of the Corinth Rift where convincing evidence for strike-slip movement has been found. This fault pattern is likely related to the complex deformation occurring at the diffuse junction at the western tip of the Rift between three crustal blocks: Continental Greece, Peloponnese, and the Ionian Island-Akarnania block

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Observation of the spread of slow deformation in Greece following the breakup of the slab

Durand

Bouchon

Floyd

et al. 2014

Geophysical Research Letters

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Over the past two decades, geophysical observations have shown that earthquakes can trigger other earthquakes, raising the possibility that earthquake interaction plays an important role in the earth's deformation. We analyze here a "storm" of earthquakes in Greece and show that their interaction provides remarkable insight into the mechanics of one of the fastest deforming continental region in the world. A rupture of the African slab initiates a cascade of large earthquakes and a long episode of slow slip marking the downward plunge of the slab, the concomitant rollback of the subduction, and the subsequent detachment of southern Greece from the Eurasian plate. Intense crustal deformation, indicative of the resulting plate stretching, follows. This slow deformation which spreads in a few months over more than 500 km lasts~3 years and triggers earthquakes. The observations also show that the retreat of the African subduction is the motor of the Aegean deformation.

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Seismicity, deformation and seismic hazard in the western rift of Corinth: New insights from the Corinth Rift Laboratory (CRL)

Cited by 153 publications

References 38 publications

Source parameters estimation from broadband regional seismograms for earthquakes in the Aegean region and the Gorda plate

Source parameters estimation from broadband regional seismograms for earthquakes in the Aegean region and the Gorda plate

Active faulting at the western tip of the Gulf of Corinth, Greece, from high-resolution seismic data

Observation of the spread of slow deformation in Greece following the breakup of the slab

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